Thank you very much MikeL, I also have had the same constant crashing regarding UIAutomationcore.dll. I too had applied this old CTD fix for FSX, I am running Win7x64, and copying a backup I made from my Syswow64 folder to the Plan-G folder solved the constant crashes with the error type: UIAutomationTypes.

I hope others with the same crashes can find this thread, because it almost put me off using this incredible tool.